package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberRespVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @Author 黄旭瑞
 * @Date 2022-05-30-12-21
 */

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewController 将请求和页面映射
     * @return
     */

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        //TODO 1. 接口防刷

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if ((System.currentTimeMillis() - l) < 60000) {
                // 60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),  BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        // 2. 验证码的再次校验 redis 存key-phone, value-code   sms:code:15970299583    -> 2344

        int hashCode = UUID.randomUUID().toString().hashCode();
        if (hashCode < 0) {
            hashCode = -hashCode;
        }
        String code = String.format("%010d", hashCode).substring(0,4) + "_" + System.currentTimeMillis();
        // redis缓存验证码 ， 防止同一个手机号在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, code, 10, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone, code.split("_")[0]);
        return R.ok();
    }

    /**
     * RedirectAttributes redirectAttributes : 模拟重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes) {
        if (result.hasErrors()) {
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors", errors);
            redirectAttributes.addFlashAttribute("errors", errors);
            // 校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        // Request method 'POST' not supported
        // 用户注册 -> /regist[post] ---> 转发到 reg.html (路径映射默认都是get方式访问的)


        // 1. 校验验证码
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                // 删除验证码; 令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 验证码通过  // 真正注册 调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    // 成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    // 失败
                    Map<String, String > errors = new HashMap<>();
                    errors.put("msg", r.getData("msg", new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }else {
                // 验证码输入错误
                Map<String, String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                // 校验出错，转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            // 通过手机号获取不到验证码
            Map<String, String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            // 校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }


    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            // 没登录
            return "login";
        }else {
            // 登录了
            return "redirect:http://gulimall.com";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo,
                        RedirectAttributes redirectAttributes,
                        HttpSession session) {

        // 远程登录
        R r = memberFeignService.login(vo);
        if (r.getCode() == 0) {
            //成功
            MemberRespVo data = r.getData("data", new TypeReference<MemberRespVo>() {
            });
            // 成功放到session中
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        }else {
            // 失败
            Map<String,String> errors = new HashMap<>();
            errors.put("msg", r.getData("msg", new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/login.html";

        }


    }
}
